Summary Of Significant Accounting Policies (Schedule Of Earnings Per Share, Basic And Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Accounting Policies [Abstract]
Net income	$ 61,328	$ 25,084	$ 27,494
Weighted average common shares outstanding (in shares)	19,163	19,040	16,027
Effect of dilutive securities
Stock-based compensation (in shares)	130	97	105
Tangible equity units (in shares)	0	0	47
Weighted average dilutive common shares outstanding (in shares)	19,293	19,137	16,179
Earnings per share
Basic (in dollars per share)	$ 3.20	$ 1.32	$ 1.72
Diluted (in dollars per share)	$ 3.18	$ 1.31	$ 1.70